Sewaren
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Sewaren, NJ

Ocean temperature

In Sewaren, New Jersey, in December, the average water temperature is 47.1°F (8.4°C).
Note: Swimming in 47.1°F (8.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

December has the shortest days of the year in Sewaren, with an average of 9.3h of daylight.

How cold is the water in December in Sewaren?

In December, the average ocean temperature in Sewaren, New Jersey, is 47.1°F (8.4°C). Swimming in 47.1°F (8.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Sewaren?

December has the shortest days of the year in Sewaren, with an average of 9.3h of daylight.

How many hours of daylight does Sewaren have in December?

The average length of the day in December in Sewaren is 9.3h.
Average sea temperature in December - Sewaren, NJ
  • Average sea temperature in December: 47.2°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight in December - Sewaren, NJ
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.3h).